Double-liquid glue injection valve with circulation loop

Abstract

The utility model discloses a double-liquid glue injection valve with a circulation loop. The double-liquid glue injection valve comprises a glue return valve, a pair of mutually independent glue injection valves, a confluence seat and a glue outlet nozzle, each glue injection valve is composed of a pneumatic driving part, a guide assembly, a conical sealing gasket, a valve rod and a sealing valve seat, the pneumatic driving part is connected with the guide assembly and drives the valve rod to move up and down in a cavity of the guide assembly, the conical sealing gasket is tightly connected with the valve rod, and the sealing valve seat is arranged at the bottom of the glue injection valve and connected with the confluence seat. The glue return valve is composed of a glue injection valve and a backflow block, and the backflow block is arranged at the bottom of the glue injection valve and communicated with a shell of the guide assembly of the glue injection valve. The confluence seat is respectively connected with shells of the guide assemblies of the pair of glue injection valves, and the glue outlet nozzle is connected with the confluence seat and is used for discharging mixed glue; the problems that an existing A / B pouring valve is not provided with a circulation loop, filler in glue is prone to sedimentation, and a pipeline is blocked are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of glue injection valves and relates to a two-component glue injection valve with a built-in circulation circuit. Background Art

[0002] In the field of two-component glue pouring and potting technology, the A / B two-component glue injection valve is a key device commonly used at present. Its core working principle is to accurately transport the glue of component A and the glue of component B into the A / B glue injection valve respectively through a precise metering pump system. In this process, the two-component glues will be mixed in a preset ratio to meet specific chemical reaction requirements and pouring operation requirements.

[0003] However, the A / B two-component glue injection valves in the prior art have some inherent defects and challenges. A significant problem is that after the two-component glues are mixed, they will undergo a chemical reaction and start to cure. This means that if there are any dead ends or unsmooth flow channels in the glue injection valve during the mixing process, the mixed glue may remain and cure in these areas, ultimately resulting in the blockage of the glue injection valve. Such blockage will not only affect the normal operation of the glue injection valve but also may cause equipment damage or production interruption, thereby increasing maintenance costs and reducing production efficiency. Additionally, in order to improve the thermal conductivity of the glue and meet other specific requirements, fillers such as silica powder are usually added to the glue. The addition of these fillers makes the glue prone to precipitation when standing still, thus affecting its uniformity and performance. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a two-component glue injection valve with a built-in circulation circuit to solve the problems that the existing A / B pouring valve has no circulation circuit and is prone to cause precipitation of fillers in the glue and blockage of pipelines.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A two-component glue injection valve with a built-in circulation circuit includes a glue return valve, a pair of glue injection valves, a confluence seat, and a glue outlet nozzle;

[0007] The glue injection valve includes a gas driving component, a guiding component, a valve rod, and a sealing valve seat; the gas driving component is connected to the guiding component, and the gas driving component drives the valve rod to move up and down in the cavity of the guiding component; the sealing valve seat is arranged at the bottom of the glue injection valve and is connected to the confluence seat;

[0008] The glue return valve includes a glue injection valve and a return block, and the return block is arranged at the bottom of the glue injection valve; the return block of the glue return valve is communicated with the housing of the guiding component of the glue injection valve;

[0009] The confluence seat is respectively connected to the housings of the guiding components of a pair of glue injection valves;

[0010] The glue outlet nozzle is connected to the confluence seat and is used to discharge the mixed glue.

[0011] Further, the cavity of the guiding assembly is filled with lubricating fluid.

[0012] Further, a sealing ring is provided at the connection between the pneumatic driving component and the guiding assembly.

[0013] Further, the injection valve further includes a conical sealing gasket, and the conical sealing gasket is in close contact with the valve stem; the conical sealing gasket is of a conical structure.

[0014] Further, the sealing valve seat is a polytetrafluoroethylene sealing valve seat.

[0015] Further, the pair of injection valves includes an A-component injection valve and a B-component injection valve, and the A-component injection valve is communicated with the glue return valve through a return block.

[0016] Further, a sealing ring is provided at the connection between the confluence seat and the housing of the guiding assembly.

[0017] Further, the confluence seat is hermetically connected to the glue outlet nozzle.

[0018] Further, the conical sealing gasket and the valve stem are in interference fit.

[0019] Further, the conical sealing gasket is a modified polytetrafluoroethylene sealing gasket.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] The utility model discloses a two-component injection valve with a self-circulation loop, which includes a glue return valve, a pair of mutually independent injection valves, a confluence seat and a glue outlet nozzle; the pair of injection valves can independently control two different-component glues to ensure that they can be mixed according to a precise ratio. This design not only improves the mixing accuracy but also ensures the efficiency of the mixing process; the design of the confluence seat enables the two-component glues to converge smoothly and be evenly discharged through the glue outlet nozzle, further improving the uniformity and consistency of the glue discharge; the ingenious design of the glue return valve, which is connected to the housing of the guiding assembly of the injection valve through a return block, realizes the glue circulation loop. This design effectively prevents the glue from remaining and curing at the dead corners in the injection valve, thus avoiding blockage.

[0022] Further, the cavity of the guiding assembly is filled with lubricating fluid, which prolongs the service life of the valve stem and better ensures the accuracy of the valve.

[0023] Further, the conical sealing gasket is designed to be of a conical structure. When the pressure is greater, the conical sealing gasket holds the valve stem tighter, and the sealing effect is better, ensuring that the glue will not enter the cavity of the guiding assembly.

[0024] Furthermore, the conical gasket is a modified polytetrafluoroethylene gasket, which has better wear resistance and self-lubricating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the external structure of the dual-component glue injection valve with a built-in circulation circuit of the present invention;

[0027] Figure 2 It is a cross-sectional view of the dual-component glue injection valve with a built-in circulation circuit of the present invention;

[0028] Figure 3 It is a schematic diagram of the conical gasket structure of the dual-component glue injection valve with a built-in circulation circuit of the present invention.

[0029] Wherein: 1 - air-driven component; 2 - guiding assembly; 3 - conical gasket; 4 - valve stem; 5 - sealing valve seat; 6 - confluence seat; 7 - glue outlet nozzle; 8 - return block; 9 - A-component return valve; 10 - A-component return port; 11 - A-component inlet port; 12 - A-component inlet valve; 13 - B-component inlet valve; 14 - B-component inlet port. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and marked in the drawings here can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the present invention claimed, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0032] It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the embodiments of the present utility model, it should be noted that if terms such as "upper", "lower", "horizontal", "inner", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0034] In addition, if the term "horizontal" appears, it does not mean that the component is required to be absolutely horizontal, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0035] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "coupled" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] The following further describes the present utility model in detail with reference to the drawings:

[0037] See Figure 1 , Figure 2 , the present utility model discloses a two-component injection valve with a self-circulating loop, including a backflow valve, a pair of mutually independent injection valves, a confluence seat 6, and a glue outlet nozzle 7;

[0038] The injection valve includes a gas driving component 1, a guiding component 2, a conical sealing gasket 3, a valve stem 4, and a sealing valve seat 5; the gas driving component 1 is connected to the guiding component 2, and the gas driving component 1 drives the valve stem 4 to move up and down in the cavity of the guiding component 2; the conical sealing gasket 3 is closely connected to the valve stem 4; the sealing valve seat 5 is arranged at the bottom of the injection valve and is connected to the confluence seat 6;

[0039] The backflow valve includes an injection valve and a reflux block 8, and the reflux block 8 is arranged at the bottom of the injection valve; the reflux block 8 of the backflow valve is communicated with the housing of the guiding component 2 of the injection valve;

[0040] The confluence seat 6 is respectively connected to the housings of the guiding components 2 of a pair of injection valves;

[0041] The glue outlet nozzle 7 is connected to the confluence seat 6 and is used to discharge the mixed glue.

[0042] Among them, the pneumatic driving component 1 is connected to the guiding component 2 by screws. A sealing ring is designed at the mating part to ensure its sealing effect. Driven by compressed air, the pneumatic driving component 1 drives the valve stem 4 to move up and down. The cavity of the guiding component 2 is filled with lubricating fluid, which reduces the frictional resistance during the up and down movement of the valve stem 4, greatly prolonging the service life of the valve stem 4. The conical sealing gasket 3 is a modified polytetrafluoroethylene sealing gasket, which has better wear resistance and self-lubricating performance, and is in interference fit with the valve stem 4. As Figure 3 shown, the conical sealing gasket 3 is designed as a conical structure. The greater the pressure, the greater the interference amount between the conical sealing gasket 3 and the valve stem 4, and the better the sealing performance, ensuring that the glue will not enter the cavity of the guiding component 2. The sealing valve seat 5 is made of polytetrafluoroethylene material. When the valve stem 4 moves upward, it contacts the sealing valve seat 5 for sealing, and the valve is in the closed state. When the valve stem 4 moves downward, it separates from the sealing valve seat 5, and the valve is in the open state. The confluence seat 6 is connected to the housing of the guiding component 2 by screws and sealing rings. Glue A / B enters the confluence seat 6 through the A-component glue inlet valve 12 and the B-component glue inlet valve 13. The glue outlet nozzle 7 is connected to the confluence seat 6 by screws and sealing rings. The return block 8 is connected to the housing of the guiding component 2 by screws and sealing rings.

[0043] The working principle of the present utility model is as follows: It includes an A-component glue inlet valve 12, a B-component glue inlet valve 13, and an A-component glue return valve 9. Since most of the B-component glue is a curing agent and has no filler, precipitation will not occur, so the B-component glue inlet valve 13 is not designed with a circulation circuit. During potting / pouring operation, the A / B two-component glue enters the valve body through the A-component glue inlet 11 and the B-component glue inlet 14 respectively. The A-component glue inlet valve 12 and the B-component glue inlet valve 13 are both in the open state, and the A-component glue return valve 9 is in the closed state. The A / B glue enters the mixing tube. When potting / pouring stops, the A-component glue inlet valve 12 and the B-component glue inlet valve 13 are both in the closed state, and the A-component glue return valve 9 is in the open state. The A-component glue is in a circulating state through the A-component glue return valve 9, ensuring that the glue will not precipitate and block the pipeline.

[0044] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dual-component injection valve with a built-in circulation loop, characterized in that, It includes a glue return valve, a pair of glue injection valves, a confluence seat (6) and a glue outlet nozzle (7); The glue injection valve includes a gas driving component (1), a guiding component (2), a valve stem (4) and a sealing valve seat (5); the gas driving component (1) is connected to the guiding component (2), and the gas driving component (1) drives the valve stem (4) to move up and down in the cavity of the guiding component (2); the sealing valve seat (5) is arranged at the bottom of the glue injection valve and is connected to the confluence seat (6); The glue return valve includes a glue injection valve and a return block (8), and the return block (8) is arranged at the bottom of the glue injection valve; the return block (8) of the glue return valve is communicated with the housing of the guiding component (2) of the glue injection valve; The confluence seat (6) is respectively connected to the housings of the guiding components (2) of a pair of glue injection valves; The glue outlet nozzle (7) is connected to the confluence seat (6) and is used for discharging the mixed glue.

2. The dual-component injection valve with a self-circulation loop according to claim 1, wherein The cavity of the guiding component (2) is filled with lubricating fluid.

3. The dual-component injection valve with a self-circulating loop according to claim 1, wherein A sealing ring is arranged at the connection between the gas driving component (1) and the guiding component (2).

4. The double-fluid injection valve with a self-circulation loop according to claim 1, characterized in that, The glue injection valve further includes a conical sealing gasket (3), and the conical sealing gasket (3) is in close contact with the valve stem (4); the conical sealing gasket (3) is of a conical structure.

5. The dual-component injection valve with a self-circulating loop according to claim 1, characterized in that The sealing valve seat (5) is a polytetrafluoroethylene sealing valve seat.

6. The dual-liquid injection valve with a self-contained circulation loop according to claim 1, wherein, The pair of glue injection valves includes an A-component glue injection valve and a B-component glue injection valve, and the A-component glue injection valve is communicated with the glue return valve through the return block (8).

7. The dual-component injection valve with a self-circulation loop according to claim 1, characterized in that, A sealing ring is arranged at the connection between the confluence seat (6) and the housing of the guiding component (2).

8. The dual-component injection valve with a self-circulating loop according to claim 1, characterized in that, The confluence seat (6) is hermetically connected to the glue outlet nozzle (7).

9. The dual-component injection valve with a self-circulation loop according to claim 4, characterized in that, The conical sealing gasket (3) and the valve stem (4) are in interference fit.

10. The dual-component injection valve with a self-circulation loop according to claim 4, characterized in that, The conical sealing gasket (3) is a modified polytetrafluoroethylene sealing gasket.

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